CODEWITHSUNDEEP
javaandroidandroid-asynctaskconnection
tonix
tonix

Reputation: 6939

How to check whether the android device can connecto to the network or not?

I am a beginner in Android programming, I am trying to make Http requests to a remote server and I would like to check whether the user can connect to the net or not in order to avoid my app to crash due to the fail of an AsyncTask I am making.

I found this method:

 private boolean isNetworkAvailable() {
        ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
        return activeNetworkInfo != null && activeNetworkInfo.isConnected();
 }

But when I try to call it inside the doInBackground AsyncTask method implementation the app crashes:

 class RemoteThread extends AsyncTask<String, String, String> {

    /**
     * Before starting background thread Show Progress Dialog
     * */
    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        pDialog = new ProgressDialog(IMieiDati.this);
        pDialog.setMessage("Caricamento...");
        pDialog.setIndeterminate(false);
        pDialog.setCancelable(false);
        pDialog.show();
    }


    protected String doInBackground(String... strings ){
        // checking whether the network is not available
        // but the app crashes here
        if (!isNetworkAvailable()) {
            Log.d("Message", "No Network Connection. Aborting.");   
        } 

       // here I should make the request if the network is available
    }
            ...etc, etc...

How can I resolve and e.g. show a message to the user that says something like "We are sorry, in order to use the app properly, you should connect to the network" or anything like that?

Thanks!

Upvotes: 0

Views: 36

Answers (1)

Mobi
Mobi

Reputation: 645

First it will better to check for network before executing the RemoteThread class. And also make sure you've added permissions to you application

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

<uses-permission android:name="android.permission.INTERNET"/>

Also check that your are importing right package import android.content.Context;

Upvotes: 1

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